Bloons Tower Defense 5 is the expansion to Bloons Tower Defense 4, it adds two new towers and 4 new levels! Each level has its own experiance level to it, starting at beginner, intermediate, advanced, and expert. You can also choose the personal difficulty just like in the orginal Bloons Tower Defense 4 game. Those difficulities are easy, medium and hard. The two new towers that were added are the spike factory tower and the gatling gunner tower. The Spike Factory generates spikes at the start of the level and puts as many down as long as the level is still going, this is great for the edge of the map for those pesky escaping bloons. The upgrades for it allow it to pop lead bloons, generate spikes faster and in greater quanity. The super upgrade fills the entire map with road spikes. The other tower is the Gatling Gunner which is manually controlled by where the mouse is pointed to. You can choose to direct fire at any specific point on the map whether it is a choke point, or a weak spot in your defense. Bloons Tower Defense 5 Expansion is one game not to be missed!